The probe, announced via podcast, has been widely criticized.

Some strategies on how to best use Signal to keep your messaging secure. Some strategies on how to best use Signal to keep your messaging secure. is a senior science reporter covering energy and the ...

After messages from Mike Waltz's leaked chat on the Signal app went massively public months ago, he was ousted as President Donald Trump's top national security adviser. Now, he's up for a new ...

US Defense Secretary Pete Hegseth risked endangering troops by using the Signal messaging app to discuss a strike on Houthis in Yemen, sources say a Pentagon watchdog report finds.Key points Hegseth's ...